超重力场中熔融铸造透明YAG陶瓷的新技术  

NOVEL PROCESSING OF TRANSPARENT YAG CERAMICS VIA MELT CASTING UNDER ULTRA-HIGH-GRAVITY FIELD

作　　者：裴军[1,2] 杨建辉[1,2] 梅林[1,2] 李江涛[1] 

机构地区：[1]中国科学院理化技术研究所,北京100080 [2]中国科学院研究生院,北京100039

出　　处：《硅酸盐学报》2009年第10期1669-1672,共4页Journal of The Chinese Ceramic Society

基　　金：国家"863"计划(2006AA03Z112);国家自然科学基金(50772116)资助项目

摘　　要：以超重力技术结合燃烧合成熔融铸造方法制备钇铝石榴石(yttrium aluminum garnet,YAG)透明陶瓷材料。以Al/NiO/Y2O3为反应剂,诱发各组元间的燃烧合成反应后获得陶瓷(YAG)和金属(Ni)的混合熔体产物,随后利用2种熔体的密度差异,在超重力场中实现陶瓷熔体和金属熔体的彻底分离和陶瓷的快速凝固,制备出YAG透明陶瓷材料。目前,所制备的YAG透明陶瓷相对密度最高达到99.30%,晶粒尺寸30～50μm,并具有半透明效果。进一步优化超重力场与燃烧合成过程的耦合,有望发展成为一种快速制备透明陶瓷材料的新技术。The transparent YAG ceramics via melt casting under ultra-high-gravity field was prepared.The combustion reaction of Al/NiO/Y2O3 mixture was ignited and then a molten mixture of YAG and Ni was generated.The YAG melt was separated from the Ni melt with the effect of an ultra-high-gravity field due to the different densities of theYAG melt and Ni melt.Solidification of the pure YAG melt was realized under ultra-high-gravity field.The maximum relative density of YAG ceramic ingot reached 99.30%.The range of the grain size distribution was 30-50 μm,and the polished as-fabricated ceramic sample was translucent.A novel rapid fabrication technique of transparent YAG ceramics could be developed via optimizing the integration parameters of ultra-high-gravity field with combustion synthesis.

关 键 词：超重力熔铸 燃烧合成 钇铝石榴石透明陶瓷 

分 类 号：TB321[一般工业技术—材料科学与工程]